Diagnoza

Shell small, slightly wider than long, maximum width at hinge line; ventral valve markedly convex, umbo thick; ventral interarea twice higher than the dorsal one; four-lobed cardinal process ventrally directed; ventral costae thin, rounded; costellae separated by usually wider furrows; dorsal costae somewhat thicker; 4-5 per mm at the anterior margin.

Porównanie

Polish specimens are wider and their costation is somewhat coarser.

Autekologia

Występowanie geograficzne

Eifel Mts. In Germany (synclines Prüm, Gerolstein, Hillesheim and Ahrdorf) and Łysogóry in Poland.

Zasięg czasowy

Mid Devonian

Materiały muzealne

Material from Germany and 3 articulated shells from Poland (ZPAL Bp. 48/11/1/1-3).

Literatura

Halamski, A.T. 2009. Middle Devonian Brachiopods from the northern Part of the Holy Cross Mountains, Poland in relation to selected coeval faunas. Part One: Introduction, Lingulida, Craniida, Strophomenida, Productida, Protorthida, Orthida. Palaeontographica Abteilung A, 287: 41-98.

Struve, W. 1981. Ober einige Arten von Subtransmena und Devonaria (Strophomenida). Senck. leth. 62 (2/6): 227-249, Plates 1-3; Frankfurt am Main.